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Thread: Aircon dead...

  1. #1
    Join Date
    Nov 2004
    Posts
    78

    Default Aircon dead...

    All of a sudden, when I try to put the aircon on, I get absolutely no response. The only thing recently done to the car was some welding which involved disconnecting the battery

    Neither the normal nor the recirc switches work (ie neither the small yellow tell tale on the switch lights up, nor is there any reaction by the system, electrically or mechanically). Fuses in under bonnet (hood) box all seem fine & car's otherwise been ok. Was working fne during the summer.

    Can anyone suggest where to start please? I did have an incident years ago when I changed the microfilter and didn't reconnect the wiring with excessive brilliance. However at that time the rear screen demist switch failed too. It's still working at present; just the 2 aircon switches are dead


    1992 525iXaT 166k miles GD79080
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

  2. #2
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    Check the refrigerant pressure level. If it is too low, AC will not work.

  3. #3
    Join Date
    Dec 2003
    Location
    Minneapolis, MN
    Posts
    577

    Default

    I don't know what the weather is like over in the UK, but mine often won't light up if the outside temp is below a certain degree. Then when the weather gets nicer, suddenly the AC will come on without my telling it to.

  4. #4
    Join Date
    Dec 2003
    Location
    Wellington,New Zealand
    Posts
    3,868

    Default

    have you checked under the rear seat for fuses related to a/c??
    Gone but not forgotten

  5. #5
    Join Date
    Nov 2004
    Posts
    78

    Default

    Quote Originally Posted by Tiger View Post
    Check the refrigerant pressure level. If it is too low, AC will not work.
    The weather was in fact bloody cold here (UK, south east)- not much above zero. I switched the aircon on in order to dehumidify...thats how I came to realise its wasnt working...

    Im due to make my 800m journey due south to SW France o9n Sunday...praps the temperature will be tested en route, although its been cold there too, about the same as here...
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

  6. #6
    Join Date
    Nov 2004
    Posts
    78

    Default

    can one check refrigerant pressure at home or is that a garage/stealer exercise?
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

  7. #7
    Join Date
    Nov 2004
    Posts
    78

    Default

    [sorry--posted this first in wrong slot above...]
    The weather was in fact bloody cold here (UK, south east)- not much above zero. I switched the aircon on in order to dehumidify...thats how I came to realise its wasnt working...

    Im due to make my 800m journey due south to SW France on Sunday...praps the temperature will be tested en route, although its been cold there too, about the same as here...
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

  8. #8
    Join Date
    Nov 2004
    Posts
    78

    Default

    No...will check this evening...
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

  9. #9
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    I don't know what you guys can get in UK... First... does your car have R134A refrigerant or R12? If R134a, you can check yourself if your auto parts supply R134a refrigerant with a hose and gauge on it.

    If you have R12, you need to buy an adapter... However, I don't know what you guys can buy in UK at auto parts store.

  10. #10
    Join Date
    Nov 2004
    Posts
    78

    Default

    A green bmw label on the panel on which bonnet is mounted indicates R134a.

    Is there a BMW kit available for recharging or is an independent OK, assuming one with gauge & hose can be found? Or is a kit recharge on a system which is as dead as mine not the recommended course for the novice?
    David in the UK
    86 316a 7336664
    92 525iXaT GD79080
    99 Z3 2.8a LC67252

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